hobbs



A. c. HOBBS.

Percussion Cap.

No. 94.743, Patented Sept. 14. 1869.

A. C. HOBBS, OF BRIDGEPORT, (JQNNECTICUT.

Letters Patent No. 94,7 43, dated September 14, 1869. r

IMPROVEMENT IN PERCUSSION-CAPE.

The Schedule referred to 1n these Letters Patent: and making part 0! the same.

To all 'whmn it may-concern Be it known that I, A. C. HOBBS, of Bridgeport, in

the county of Fairfield, and State of Connecticut, have invented certain new and useful Improvements in the Manufacture of Gun-Caps; and I do herebydeclare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, and to the letters ofreference marked thereon, like letters indicating like parts where er they occur.

To enable others skilled. in the art to construct and in the various stages througll which it passes in the process of manufacture.

, Figure 5 represents simply a disk, of tinfoil, as cut out for the lining.

In the manufacture of gun-caps, ithas hithertobecn customary to place in the-shell or cap a drop of var-- nish, then place therein the fulminate, and over that a disk of plain tin-foil. When thus made, the fulminate mixed with the varnish and the mass, thus comes I into direct contact with the metal of the cap, and also with the lining, when it was pressed in upon it, and by these means it often happens that the cap is ren- Jere useless.

In constructing my cap, I take the shell A, which may be of any required form and size, as shown in jig. 1, and place therein a, drop of varnish, which at once spreads over its interior surface, more or less, and as it dries,, tbrms a coating, 0, therein, as shown in fig. 2.

After-the varnish has become paifiz'ily dried, I

place the fuhninate o in the cap, as represented in- I then cut from a sheet of tin-foil, which has been previously prepared, by coating one surface with varnish, a disk, n, and place it in the cap, with its rarnished side next to the i'uhninate, as represented in fig. 4, and press itdown thereon, which completes the operation.

It will thus be seen that the fuhninate is enclosed entirely between varnished suijizces, and that .it no- .where comcsdirectly into contact with the metal.

Gaps thus made are not only watei' p1'oof, ,but they are sure fire, and'can be stored and kept for an indefinite length of time, without deterioration, either from the effects of moisture, or from any injurious effects of the meta-l upon the fuhninate, or nice verse.

Having thus described my invention, What I claim, is-

A percussion-cap, for guns, having its fuhninate enclosed between varnished surfaces, snbstantiall y as described.

A. O. HOBBS.

Witnesses:

Ronni. WRITE, A. J. Honns, 

